30402031 has 8 divisors (see below), whose sum is σ = 33508944. Its totient is φ = 27352320.

The previous prime is 30402023. The next prime is 30402077. The reversal of 30402031 is 13020403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30402031 - 2³ = 30402023 is a prime.

It is a super-2 number, since 2×30402031² = 1848566977849922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30402131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13180 + ... + 15313.

It is an arithmetic number, because the mean of its divisors is an integer number (4188618).

Almost surely, 2^30402031 is an apocalyptic number.

30402031 is a deficient number, since it is larger than the sum of its proper divisors (3106913).

30402031 is a wasteful number, since it uses less digits than its factorization.

30402031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28601.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30402031 is about 5513.8036780430. The cubic root of 30402031 is about 312.1051003305.

Adding to 30402031 its reverse (13020403), we get a palindrome (43422434).

The spelling of 30402031 in words is "thirty million, four hundred two thousand, thirty-one".